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546 lines
13 KiB
546 lines
13 KiB
/*++
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Copyright (c) 1991 Microsoft Corporation
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Copyright (c) 1992 Intel Corporation
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All rights reserved
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INTEL CORPORATION PROPRIETARY INFORMATION
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This software is supplied to Microsoft under the terms
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of a license agreement with Intel Corporation and may not be
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copied nor disclosed except in accordance with the terms
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of that agreement.
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Module Name:
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mpdetect.c
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Abstract:
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This module detects an MPS system.
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Author:
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Ron Mosgrove (Intel) - Aug 1993.
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Environment:
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Kernel mode or from textmode setup.
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Revision History:
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Rajesh Shah (Intel) - Oct 1993. Added support for MPS table.
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--*/
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#ifndef _NTOS_
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#include "halp.h"
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#endif
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#ifdef SETUP
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#define FAILMSG(a)
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#else
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#define FAILMSG(a) HalDisplayString(a)
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extern UCHAR rgzNoMpsTable[];
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extern UCHAR rgzNoApic[];
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extern UCHAR rgzBadApicVersion[];
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extern UCHAR rgzApicNotVerified[];
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extern UCHAR rgzMPPTRCheck[];
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extern UCHAR rgzNoMPTable[];
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extern UCHAR rgzMPSBadSig[];
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extern UCHAR rgzMPSBadCheck[];
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extern UCHAR rgzBadDefault[];
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extern UCHAR rgzNoMem[];
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#endif
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// Include the code that actually detect a MPS system
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#include "pcmpdtct.c"
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BOOLEAN
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HalpVerifyIOUnit (
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IN PUCHAR BaseAddress
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);
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VOID
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HalpInitMpInfo (
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IN struct PcMpTable *MpTablePtr
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);
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ULONG
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DetectMPS (
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OUT PBOOLEAN IsConfiguredMp
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);
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ULONG
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DetectUPMPS (
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OUT PBOOLEAN IsConfiguredMp
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);
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extern struct PcMpTable *GetPcMpTable( VOID );
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ULONG UserSpecifiedNoIoApic = 0;
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struct HalpMpInfo HalpMpInfoTable;
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struct PcMpTable HalpPcMpTable;
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struct PcMpTable *PcMpTablePtr;
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#ifndef SETUP
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGELK,HalpVerifyIOUnit)
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#pragma alloc_text(PAGELK,HalpInitMpInfo)
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#pragma alloc_text(PAGELK,DetectMPS)
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#pragma alloc_text(PAGELK,DetectUPMPS)
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#endif // ALLOC_PRAGMA
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extern struct PcMpTable *PcMpDefaultTablePtrs[];
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#endif // SETUP
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BOOLEAN
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HalpVerifyIOUnit(
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IN PUCHAR BaseAddress
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)
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/*++
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Routine Description:
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Verify that an IO Unit exists at the specified address
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Arguments:
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BaseAddress - Virtual address of the IO Unit to test.
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Return Value:
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BOOLEAN - TRUE if a IO Unit was found at the passed address
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- FALSE otherwise
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--*/
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{
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union ApicUnion {
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ULONG Raw;
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struct ApicVersion Ver;
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} Temp1, Temp2;
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struct ApicIoUnit *IoUnitPtr = (struct ApicIoUnit *) BaseAddress;
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//
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// The documented detection mechanism is to write all zeros to
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// the Version register. Then read it back. The IO Unit exists if the
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// same result is read both times and the Version is valid.
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//
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IoUnitPtr->RegisterSelect = IO_VERS_REGISTER;
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IoUnitPtr->RegisterWindow = 0;
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IoUnitPtr->RegisterSelect = IO_VERS_REGISTER;
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Temp1.Raw = IoUnitPtr->RegisterWindow;
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IoUnitPtr->RegisterSelect = IO_VERS_REGISTER;
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IoUnitPtr->RegisterWindow = 0;
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IoUnitPtr->RegisterSelect = IO_VERS_REGISTER;
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Temp2.Raw = IoUnitPtr->RegisterWindow;
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if ((Temp1.Ver.Version != Temp2.Ver.Version) ||
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(Temp1.Ver.MaxRedirEntries != Temp2.Ver.MaxRedirEntries)) {
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//
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// No IO Unit There
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//
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return (FALSE);
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}
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return (TRUE);
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}
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VOID
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HalpInitMpInfo (
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IN struct PcMpTable *MpTablePtr
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)
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/*++
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Routine Description:
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This routine initializes a HAL specific data structure that is
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used by the HAL to simplify access to MP information.
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Arguments:
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MpTablePtr: Pointer to the MPS table.
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Return Value:
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Pointer to the HAL MP information table.
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*/
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{
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PUCHAR TraversePtr, EndOfBaseTable;
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UCHAR CheckSum;
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// Walk the MPS table. The HAL MP information structure has
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// pointers to the first entry for each entry type in the MPS
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// table. Set these pointers.
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TraversePtr = (PUCHAR) MpTablePtr + HEADER_SIZE;
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EndOfBaseTable = (PUCHAR) MpTablePtr + MpTablePtr->TableLength;
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HalpMpInfoTable.ApicVersion =
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(ULONG) (((PPCMPPROCESSOR)(TraversePtr))->LocalApicVersion & 0xf0);
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while (TraversePtr < EndOfBaseTable) {
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switch (*TraversePtr) {
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case ENTRY_PROCESSOR:
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if(((PPCMPPROCESSOR)(TraversePtr))->CpuFlags & CPU_ENABLED) {
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if (HalpMpInfoTable.ProcessorCount == 0) {
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HalpMpInfoTable.ProcessorEntryPtr =
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(PPCMPPROCESSOR) TraversePtr;
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}
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HalpMpInfoTable.ProcessorCount++;
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}
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TraversePtr += sizeof(PCMPPROCESSOR);
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break;
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case ENTRY_BUS:
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if (HalpMpInfoTable.BusCount == 0) {
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HalpMpInfoTable.BusEntryPtr = (PPCMPBUS) TraversePtr;
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}
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HalpMpInfoTable.BusCount += 1;
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TraversePtr += sizeof(PCMPBUS);
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break;
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case ENTRY_IOAPIC:
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if ((((PPCMPIOAPIC)(TraversePtr))->IoApicFlag &
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IO_APIC_ENABLED) && (UserSpecifiedNoIoApic == 0)) {
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if (HalpMpInfoTable.IOApicCount == 0) {
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HalpMpInfoTable.IoApicEntryPtr =
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(PPCMPIOAPIC) TraversePtr;
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}
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HalpMpInfoTable.IOApicCount += 1;
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}
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TraversePtr += sizeof(PCMPIOAPIC);
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break;
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case ENTRY_INTI:
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if (HalpMpInfoTable.IntiCount == 0) {
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HalpMpInfoTable.IntiEntryPtr = (PPCMPINTI) TraversePtr;
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}
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HalpMpInfoTable.IntiCount += 1;
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TraversePtr += sizeof(PCMPINTI);
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break;
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case ENTRY_LINTI:
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if (HalpMpInfoTable.LintiCount == 0) {
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HalpMpInfoTable.LintiEntryPtr = (PPCMPLINTI) TraversePtr;
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}
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HalpMpInfoTable.LintiCount += 1;
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TraversePtr += sizeof(PCMPLINTI);
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break;
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default:
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//
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// Unknown MPS entry. Since we don't know it's size, we will
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// terminate parsing here.
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//
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DBGMSG("HAL: Invalid MPS table entry type detected\n");
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TraversePtr = EndOfBaseTable;
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break;
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} // switch
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} // while
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//
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// Check for Extension table defined
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//
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if (MpTablePtr->ExtTableLength &&
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MpTablePtr->TableLength + MpTablePtr->ExtTableLength < 8192) {
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CheckSum = ComputeCheckSum(
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(PUCHAR) MpTablePtr + MpTablePtr->TableLength,
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MpTablePtr->ExtTableLength
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);
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CheckSum += MpTablePtr->ExtTableChecksum;
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if (CheckSum != 0) {
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DBGMSG("HALMPS: InitMpInfo: Extension table checksum error\n");
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} else {
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HalpMpInfoTable.ExtensionTable = (PMPS_EXTENTRY)
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(((PUCHAR) MpTablePtr) + MpTablePtr->TableLength);
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HalpMpInfoTable.EndOfExtensionTable = (PMPS_EXTENTRY)
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(((PUCHAR) MpTablePtr) + MpTablePtr->TableLength +
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MpTablePtr->ExtTableLength);
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}
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}
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return;
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}
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ULONG
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DetectMPS(
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OUT PBOOLEAN IsConfiguredMp
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)
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/*++
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Routine Description:
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This function is called from HalInitializeProcessors to determine
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if this is an appropriate system to run the MPS hal on.
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The recommended detection mechanism is:
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if ( MPS information does not exist )
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then
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System is not MPS compliant. Return false.
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In MP table:
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if ( number IO APICs < 1 )
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then
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Not a MPS System - return false
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if ( # CPUs = 1 )
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then
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Found a Single Processor MPS System
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else
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Found a MP MPS System
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A side effect of this routine is the mapping of the IO UNits and
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Local unit virtual addresses.
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Return TRUE
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Arguments:
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IsConfiguredMp - TRUE if this machine is a MP instance of the MPS spec, else FALSE.
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Return Value:
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0 - if not a MPS
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1 - if MPS
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*/
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{
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UCHAR ApicVersion, i;
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PUCHAR LocalApic;
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PPCMPIOAPIC IoEntryPtr;
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PHYSICAL_ADDRESS physicalAddress;
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//
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// Initialize MpInfo table
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//
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RtlZeroMemory (&HalpMpInfoTable, sizeof HalpMpInfoTable);
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//
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// Set the return Values to the default
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//
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*IsConfiguredMp = FALSE;
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//
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// See if there is a MP Table
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//
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#if 1
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if ((PcMpTablePtr = GetPcMpTable()) == NULL) {
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FAILMSG (rgzNoMpsTable);
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return(FALSE);
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}
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#else
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//********
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//******** HACK! To make down level 1.0 machine work
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//********
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if ((PcMpTablePtr = MPS10_GetPcMpTable()) == NULL) {
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FAILMSG (rgzNoMpsTable);
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return(FALSE);
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}
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#endif
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#ifdef SETUP
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// During setup, if we detected a default MPS configuration, we have
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// no more checking to do.
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if (PcMpTablePtr == (struct PcMpTable *) DEFAULT_MPS_INDICATOR) {
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*IsConfiguredMp = TRUE;
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return(TRUE);
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}
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#endif // SETUP
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#if DEBUGGING
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HalpDisplayConfigTable();
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#endif
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// We have a MPS table. Initialize a HAL specific MP information
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// structure that gets information from the MPS table.
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HalpInitMpInfo(PcMpTablePtr);
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// Verify the information in the MPS table as best as we can.
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if (HalpMpInfoTable.IOApicCount == 0) {
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//
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// Someone Has a MP Table and no IO Units -- Weird
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// We have to assume the BIOS knew what it was doing
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// when it built the table. so ..
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//
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FAILMSG (rgzNoApic);
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return (FALSE);
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}
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//
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// It's a MPS System. It could be a UP System though.
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//
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#ifdef SETUP
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//
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// If this is a MPS (MPS) compliant system, but has only 1 processor,
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// for now we want to install a standard UP kernel and HAL.
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//
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if (HalpMpInfoTable.ProcessorCount <= 1) {
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return FALSE;
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}
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#endif
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if (HalpMpInfoTable.ProcessorCount > 1) {
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*IsConfiguredMp = TRUE;
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}
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HalpMpInfoTable.LocalApicBase = (ULONG) PcMpTablePtr->LocalApicAddress;
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physicalAddress.QuadPart = HalpMpInfoTable.LocalApicBase;
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LocalApic = (PUCHAR) HalpMapPhysicalMemoryWriteThrough64(
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physicalAddress,1);
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if (!LocalApic) {
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FAILMSG (rgzNoMem);
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return (FALSE);
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}
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#ifndef SETUP
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HalpRemapVirtualAddress64 (
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(PVOID) LOCALAPIC,
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physicalAddress,
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TRUE
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);
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#endif
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ApicVersion = (UCHAR) *(LocalApic + LU_VERS_REGISTER);
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if (ApicVersion > 0x1f) {
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//
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// Only known Apics are 82489dx with version 0.x and
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// Embedded Apics with version 1.x (where x is don't care)
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//
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// Return of 0xFF? Can't have an MPS system without a Local Unit.
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//
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#ifdef DEBUGGING
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sprintf(Cbuf, "HALMPS: apic version %x, read from %x\n",
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ApicVersion, LocalApic + LU_VERS_REGISTER);
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HalDisplayString(Cbuf);
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#endif
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FAILMSG (rgzBadApicVersion);
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return (FALSE);
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}
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#ifdef SETUP
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//
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// MP MPS table, and the local APIC ID looked OK.
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//
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return TRUE;
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#endif //SETUP
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#ifdef DEBUGGING
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if ((ApicVersion & 0xf0) == 0) {
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if (HalpMpInfoTable.ApicVersion != APIC_82489DX)
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HalDisplayString("HAL:Invalid Local Apic version in MP table\n");
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else {
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sprintf(Cbuf, "HAL: DetectMPS: Found 82489DX Local APIC (Ver 0x%x) at 0x%lx\n",
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ApicVersion, LocalApic);
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HalDisplayString(Cbuf);
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}
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} else {
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sprintf(Cbuf, "HAL: DetectMPS: Found Embedded Local APIC (Ver 0x%x) at 0x%lx\n",
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ApicVersion, LocalApic);
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HalDisplayString(Cbuf);
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}
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#endif // DEBUGGING
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#ifndef SETUP
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HalpUnmapVirtualAddress(LocalApic,1);
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#endif
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IoEntryPtr = HalpMpInfoTable.IoApicEntryPtr;
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for(i=0; i < HalpMpInfoTable.IOApicCount; i++, IoEntryPtr++)
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{
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if (IoEntryPtr->IoApicFlag & IO_APIC_ENABLED) {
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//
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// Verify the existance of the IO Units
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//
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physicalAddress.QuadPart = (ULONG)IoEntryPtr->IoApicAddress;
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HalpMpInfoTable.IoApicPhys[i] = (ULONG)IoEntryPtr->IoApicAddress;
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HalpMpInfoTable.IoApicBase[i] = (PULONG)
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HalpMapPhysicalMemoryWriteThrough64(physicalAddress, 1);
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//
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// Verify the existance of the IO Unit
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//
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if (!(HalpVerifyIOUnit((PUCHAR)HalpMpInfoTable.IoApicBase[i]))) {
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FAILMSG (rgzApicNotVerified);
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return (FALSE);
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}
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}
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}
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DBGMSG("HAL: DetectMPS: MPS system found - Returning TRUE\n");
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return(TRUE);
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}
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ULONG
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DetectUPMPS(
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OUT PBOOLEAN IsConfiguredMp
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)
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/*++
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Routine Description:
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This function is called by setup after DetectMPS has returned
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false. During setup time DetectMPS will return false, if the
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machine is an MPS system, but only has one processor. This
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function is used to detect such a machine at setup time.
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Arguments:
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IsConfiguredMp - FALSE
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Return Value:
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0 - if not a UP MPS
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1 - if UP MPS
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--*/
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{
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*IsConfiguredMp = FALSE;
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// we assume the caller has already called DetectMPS, and the
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// MPS table has already been parsed.
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return (HalpMpInfoTable.ProcessorCount == 1 ? TRUE : FALSE);
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}
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